Abstract
Pumped hydro energy storage (PHES) can relieve the variability and fluctuation of wind energy in power system. Introducing PHES and wind power into unit commitment (UC) has great significance in the control and operation of power systems, which as well as brings great challenge. In this paper, two harmony search methods called ACHS and NPAHS-M are applied to UC-Wind-PHES problems. Numerical experiments have been done on a power system with one PHES station, one wind power unit and ten thermal units. Comparison results show that ACHS and NPAHS-M can provide higher accuracy and better convergence speed, and the utilization of PHES contributes to the improvement of cost saving and system robustness.
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